A 60-second walkthrough · pre-baked, no agent call
How RCCA Copilot keeps the engineer the decider.
The same flow you can run yourself on a sample — shown end to end on one investigation, so you can see how the agent drafts and cites while the human edits, signs, and stays accountable. Try it on a real sample →
1 · The nonconformance
2 · The agent's cited 8D draft
Every section is drafted from tool-retrieved evidence — and the engineer can edit any of it.
Type II sulfuric anodic coating on lot LOT-AN-42 (PN-AL-3382) measured 0.4 mil, below the SPEC-AN-7 §4.2 floor of 0.7 mil (required 0.7–1.2 mil) — ~43% under the minimum. Engineer note: confirmed against the calibrated reference standard; 3 of 5 points below floor.
Quarantine lot LOT-AN-42 and 100% eddy-current inspect at five points per SPEC-AN-7 §4.2; hold downstream lots on the same rectifier pending the voltage finding.
Bath voltage sagged from the ~15 V setpoint to ~11 V mid-run (PD-AN-42-03/04), dropping current density to 7.9 asf (PD-AN-42-07). Coating growth is charge-driven, so the sustained low current density is mechanistically consistent with the 0.4 mil result, and mirrors recurrence NC-PRIOR-101. Underlying reason for the sag is not yet established.
Pending root-cause confirmation: retrieve rectifier output/maintenance logs for the run; if rectifier-confirmed, repair/replace the failing component (as in NC-PRIOR-101) and verify output under load before returning the line to service.
Add in-run SPC/interlock on bath voltage and current density with auto-alarm; verify per-run rectifier output checks; require recorded five-point thickness per SPEC-AN-7 §4.2.
3 · Approve the evidence, not the prose
Rectifier output sag took bath voltage from ~15 V to ~11 V, pulling current density to 7.9 asf and starving anodic coating growth — producing the 0.4 mil result. Mechanism matches recurrence NC-PRIOR-101.
Bath-temperature excursion as a contributor — excluded by evidence; bath temp was in range.
False-low eddy-current reading (probe calibration or single- vs five-point). No calibration record or full five-point dataset was retrieved.
4 · The human signs off
Nothing is CAPA-ready until every section is approved — the gate is computed, never forced.
5 · The audit trail is the evidence of human judgment
See the full audit trail (all sections + event log) →
6 · Export the signed 8D / CAPA
# 8D / CAPA — NC-TOUR-001: Anodize coating thickness below spec floor - **Part:** PN-AL-3382 - **Lot:** LOT-AN-42 - **Process:** Type II sulfuric anodize - **Spec violated:** SPEC-AN-7 - **Measured vs. required:** 0.4 mil vs. 0.7–1.2 mil - **CAPA-ready:** YES ## D2 — Problem description Type II sulfuric anodic coating on lot LOT-AN-42 (PN-AL-3382) measured 0.4 mil, below the SPEC-AN-7 §4.2 floor of 0.7 mil (required 0.7–1.2 mil) — ~43% under the minimum. Engineer note: confirmed against the calibrated reference standard; 3 of 5 points below floor. *Approved by H. Garza (Quality Eng.) on 2026-06-07 23:44 UTC.* ## D3 — Interim containment Quarantine lot LOT-AN-42 and 100% eddy-current inspect at five points per SPEC-AN-7 §4.2; hold downstream lots on the same rectifier pending the voltage finding. *Approved by H. Garza (Quality Eng.) on 2026-06-07 23:44 UTC.* ## D4 — Root cause Bath voltage sagged from the ~15 V setpoint to ~11 V mid-run (PD-AN-42-03/04), dropping current density to 7.9 asf (PD-AN-42-07). Coating growth is charge-driven, so the sustained low current density is mechanistically consistent with the 0.4 mil result, and mirrors recurrence NC-PRIOR-101. Underlying reason for the sag is not yet established. **Candidate causes (Ishikawa / 6M):** - **Machine** (High confidence): Rectifier output sag took bath voltage from ~15 V to ~11 V, pulling current density to 7.9 asf and starving anodic coating growth — producing the 0.4 mil result. Mechanism matches recurrence NC-PRIOR-101. - Evidence: `PD-LOT-AN-42` · PD-AN-42-03 — bath_voltage_V 11.3 below setpoint - Evidence: `PD-LOT-AN-42` · PD-AN-42-07 — current_density_asf 7.9 (low) - Evidence: `NC-PRIOR-101` · root_cause — Rectifier B output sagged, lowering current density and starving growth - **Environment** (Low confidence): Bath-temperature excursion as a contributor — excluded by evidence; bath temp was in range. - Evidence: `PD-LOT-AN-42` · PD-AN-42-09 — bath_temp_F 70.0 (in range) - **Measurement** (Insufficient evidence — investigate further): False-low eddy-current reading (probe calibration or single- vs five-point). No calibration record or full five-point dataset was retrieved. *Approved by H. Garza (Quality Eng.) on 2026-06-07 23:44 UTC.* ## D5 — Permanent corrective action Pending root-cause confirmation: retrieve rectifier output/maintenance logs for the run; if rectifier-confirmed, repair/replace the failing component (as in NC-PRIOR-101) and verify output under load before returning the line to service. *Approved by H. Garza (Quality Eng.) on 2026-06-07 23:44 UTC.* ## D7 — Prevent recurrence Add in-run SPC/interlock on bath voltage and current density with auto-alarm; verify per-run rectifier output checks; require recorded five-point thickness per SPEC-AN-7 §4.2. *Approved by H. Garza (Quality Eng.) on 2026-06-07 23:44 UTC.* --- _Simulated data for demonstration only. Entirely fictional — not affiliated with any employer and not derived from any real nonconformance, process, or specification._